Structure Identification: |
J Nat Prod. 2010 Nov 29;73(11):1933-7. | Microbial transformations of aryltetralone and aryltetralin lignans by Cunninghamella echinulata and Beauveria bassiana.[Pubmed: 20961092] |
METHODS AND RESULTS:
Microbiological transformation of the aryltetralone lignan (-)-8'-epi-aristoligone (1) with Cunninghamella echinulata ATCC 10028B afforded two known natural lignans, (-)-Holostyligone (3) and (-)-arisantetralone (4). Incubation of the aryltetralin lignan (-)-isogalbulin (2), obtained by chemical transformation of 1, with C. echinulata ATCC 10028B afforded the known lignan aryltetralol (5) and seven new metabolites, (-)-8-hydroxyisogalbulin (6), (-)-7-methoxyisogalbulin (7), (-)-4'-O-demethyl-8-hydroxyisogalbulin (8), (-)-7-methoxy-8-hydroxyisogalbulin (9), (-)-4'-O-demethyl-7-methoxyisogalbulin (10), (-)-4',5-O-didemethylcyclogalgravin (11), and (-)-4'-O-demethylcyclogalgravin (12). When 2 was subjected to biotransformation with Beauveria bassiana ATCC 7159, (-)-8-hydroxyisogalbulin (6) was the only isolable product.
CONCLUSIONS:
The structures of all new compounds were established by detailed analysis of their spectroscopic data. |
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